Shock-absorbing housing for an electric tool

Abstract

A shock-absorbing housing for an electric tool includes a shell unit and a shock-absorption unit connected to the shell unit. The shell unit includes limiting portions each having a first hole-defining section that defines a first hole, and a second hole-defining section that defines a second hole. The first hole has a diameter greater than that of the second hole. The shock-absorption unit includes elastic bodies. Each of the elastic bodies includes a first compressive section that extends through the first hole and that is spaced apart from the first hole-defining section, and a second compressive section that is opposite to the first compressive section and that extends through the second hole. The first compressive section has a protruding portion that protrudes outwardly from the first hole-defining section, and that is adapted for abutting against a trigger device of the electric tool.

What is claimed is: 
     
         1 . A shock-absorbing housing for an electric tool, the electric tool including an electric device that converts electric energy into kinetic energy, a power unit that outputs the kinetic energy, and a trigger device that is operable to activate the electric device, said shock-absorbing housing comprising:
 a shell unit including two shells that are arranged in a first direction, that are connected to each other, and that cooperatively define a mounting space adapted for accommodating the electric device, the power unit and the trigger device, each of said two shells having an inner surface that faces said mounting space, an outer surface that is opposite to said inner surface, and a plurality of limiting portions, said plurality of limiting portions of one of said two shells being respectively aligned with and spaced apart from said plurality of limiting portions of another one of said two shells in said first direction, each of said plurality of limiting portions having
 a first hole-defining section that protrudes from said inner surface, that is adapted to protrude toward the trigger device, and that defines a first hole, and 
 a second hole-defining section that is opposite to said first hole-defining section and that defines a second hole, said first hole having a diameter that is greater than a diameter of said second hole, said first hole and said second hole being adapted to be respectively adjacent to and distal from the trigger device; and 
   a shock-absorption unit connected to said shell unit and including a plurality of elastic bodies, said elastic bodies extending in said first direction and respectively through said plurality of limiting portions of said two shells, each of said plurality of elastic bodies including a first compressive section that extends through said first hole defined by said first hole-defining section of the respective one of said plurality of limiting portions of said two shells and that is spaced apart from said first hole-defining section of the respective one of said plurality of limiting portions of said two shells, and a second compressive section that is opposite to said first compressive section and that extends through said second hole defined by said second hole-defining section of the respective one of said plurality of limiting portions of said two shells, said first compressive section having a protruding portion that protrudes outwardly from said first hole-defining section of the respective one of said plurality of limiting portions of said two shells, said protruding portions of said first compressive sections of said elastic bodies being adapted for abutting against two lateral surfaces of the trigger device that are opposite to each other in said first direction.   
     
     
         2 . The shock-absorbing housing as claimed in  claim 1 , wherein said second compressive section of each of said plurality of elastic bodies is fittingly engaged with said second hole-defining section of the respective one of said plurality of limiting portions of said two shells. 
     
     
         3 . The shock-absorbing housing as claimed in  claim 2 , wherein said second hole-defining section of each of said plurality of limiting portions extends through said outer surface, and said second hole defined by said second hole-defining section of each of said plurality of limiting portions communicates with said first hole defined by said first hole-defining section of said each of said plurality of limiting portions. 
     
     
         4 . The shock-absorbing housing as claimed in  claim 3 , wherein each of said plurality of elastic bodies is made of rubber. 
     
     
         5 . The shock-absorbing housing as claimed in  claim 4 , wherein said shock-absorption unit further includes a protection layer that is formed integrally with said plurality of elastic bodies and that covers said outer surfaces of said two shells. 
     
     
         6 . The shock-absorbing housing as claimed in  claim 1 , wherein each of said plurality of elastic bodies is configured as a spring and is adapted to abut against said trigger device. 
     
     
         7 . The shock-absorbing housing as claimed in  claim 1 , wherein, for each of said elastic bodies, a ratio of a length of said first compressive section in said first direction to a length of said protruding portion in said first direction ranges from 1:7 to 1:8. 
     
     
         8 . The shock-absorbing housing as claimed in  claim 7 , wherein:
 said first hole-defining section of each of said limiting portions is adapted to cooperate with one of the two lateral surfaces of the trigger device to define a gap therebetween; and   a ratio of said gap to said length of said first compressive section of each of said elastic bodies ranges from 1:12.6 to 1:76.   
     
     
         9 . The shock-absorbing housing as claimed in  claim 7 , wherein:
 said first hole-defining section of each of said limiting portions is adapted to cooperate with one of the two lateral surfaces of the trigger device to define a gap therebetween; and   a ratio of said gap to said length of said protruding portion of said first compressive section of each of said elastic bodies ranges from 1:1.6 to 1:10.   
     
     
         10 . The shock-absorbing housing as claimed in  claim 1 , wherein, for each of said elastic bodies, said first compressive section has a first maximum width in a second direction that is substantially perpendicular to said first direction, and said second compressive section has a second maximum width in said second direction, said second maximum width being greater than said first maximum width.